"For this preliminary release, we are focusing on the developer experience, working to enable Qt developers to easily run and test their applications on Android devices. While there's nothing preventing you from deploying your app to an app store with Qt 5.1, we're recommending that people wait until Qt 5.2 before they do that, as we'd like to put some more work into improving that experience: making more options for how your app is deployed, adding more polish in general, and adding more support for Android APIs, both by allowing you to extend your app with Java code or by mapping them in C++ APIs, whichever makes the most sense."